// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * GPR board platform device registration (Au1550)
 *
 * Copyright (C) 2010 Wolfgang Grandegger <wg@denx.de>
 */

#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/platform_data/i2c-gpio.h>
#include <linux/gpio/machine.h>
#include <asm/bootinfo.h>
#include <asm/idle.h>
#include <asm/reboot.h>
#include <asm/setup.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/gpio-au1000.h>
#include <prom.h>

const char *get_system_type(void)
{
        return "GPR";
}

void prom_putchar(char c)
{
        alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
}

static void gpr_reset(char *c)
{
        /* switch System-LED to orange (red# and green# on) */
        alchemy_gpio_direction_output(4, 0);
        alchemy_gpio_direction_output(5, 0);

        /* trigger watchdog to reset board in 200ms */
        printk(KERN_EMERG "Triggering watchdog soft reset...\n");
        raw_local_irq_disable();
        alchemy_gpio_direction_output(1, 0);
        udelay(1);
        alchemy_gpio_set_value(1, 1);
        while (1)
                cpu_wait();
}

static void gpr_power_off(void)
{
        while (1)
                cpu_wait();
}

void __init board_setup(void)
{
        printk(KERN_INFO "Trapeze ITS GPR board\n");

        pm_power_off = gpr_power_off;
        _machine_halt = gpr_power_off;
        _machine_restart = gpr_reset;

        /* Enable UART1/3 */
        alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
        alchemy_uart_enable(AU1000_UART1_PHYS_ADDR);

        /* Take away Reset of UMTS-card */
        alchemy_gpio_direction_output(215, 1);
}

/*
 * Watchdog
 */
static struct resource gpr_wdt_resource[] = {
        [0] = {
                .start  = 1,
                .end    = 1,
                .name   = "gpr-adm6320-wdt",
                .flags  = IORESOURCE_IRQ,
        }
};

static struct platform_device gpr_wdt_device = {
        .name = "adm6320-wdt",
        .id = 0,
        .num_resources = ARRAY_SIZE(gpr_wdt_resource),
        .resource = gpr_wdt_resource,
};

/*
 * FLASH
 *
 * 0x00000000-0x00200000 : "kernel"
 * 0x00200000-0x00a00000 : "rootfs"
 * 0x01d00000-0x01f00000 : "config"
 * 0x01c00000-0x01d00000 : "yamon"
 * 0x01d00000-0x01d40000 : "yamon env vars"
 * 0x00000000-0x00a00000 : "kernel+rootfs"
 */
static struct mtd_partition gpr_mtd_partitions[] = {
        {
                .name   = "kernel",
                .size   = 0x00200000,
                .offset = 0,
        },
        {
                .name   = "rootfs",
                .size   = 0x00800000,
                .offset = MTDPART_OFS_APPEND,
                .mask_flags = MTD_WRITEABLE,
        },
        {
                .name   = "config",
                .size   = 0x00200000,
                .offset = 0x01d00000,
        },
        {
                .name   = "yamon",
                .size   = 0x00100000,
                .offset = 0x01c00000,
        },
        {
                .name   = "yamon env vars",
                .size   = 0x00040000,
                .offset = MTDPART_OFS_APPEND,
        },
        {
                .name   = "kernel+rootfs",
                .size   = 0x00a00000,
                .offset = 0,
        },
};

static struct physmap_flash_data gpr_flash_data = {
        .width          = 4,
        .nr_parts       = ARRAY_SIZE(gpr_mtd_partitions),
        .parts          = gpr_mtd_partitions,
};

static struct resource gpr_mtd_resource = {
        .start  = 0x1e000000,
        .end    = 0x1fffffff,
        .flags  = IORESOURCE_MEM,
};

static struct platform_device gpr_mtd_device = {
        .name           = "physmap-flash",
        .dev            = {
                .platform_data  = &gpr_flash_data,
        },
        .num_resources  = 1,
        .resource       = &gpr_mtd_resource,
};

/*
 * LEDs
 */
static const struct gpio_led gpr_gpio_leds[] = {
        {       /* green */
                .name                   = "gpr:green",
                .gpio                   = 4,
                .active_low             = 1,
        },
        {       /* red */
                .name                   = "gpr:red",
                .gpio                   = 5,
                .active_low             = 1,
        }
};

static struct gpio_led_platform_data gpr_led_data = {
        .num_leds = ARRAY_SIZE(gpr_gpio_leds),
        .leds = gpr_gpio_leds,
};

static struct platform_device gpr_led_devices = {
        .name = "leds-gpio",
        .id = -1,
        .dev = {
                .platform_data = &gpr_led_data,
        }
};

/*
 * I2C
 */
static struct gpiod_lookup_table gpr_i2c_gpiod_table = {
        .dev_id = "i2c-gpio",
        .table = {
                /*
                 * This should be on "GPIO2" which has base at 200 so
                 * the global numbers 209 and 210 should correspond to
                 * local offsets 9 and 10.
                 */
                GPIO_LOOKUP_IDX("alchemy-gpio2", 9, NULL, 0,
                                GPIO_ACTIVE_HIGH),
                GPIO_LOOKUP_IDX("alchemy-gpio2", 10, NULL, 1,
                                GPIO_ACTIVE_HIGH),
        },
};

static struct i2c_gpio_platform_data gpr_i2c_data = {
        /*
         * The open drain mode is hardwired somewhere or an electrical
         * property of the alchemy GPIO controller.
         */
        .sda_is_open_drain      = 1,
        .scl_is_open_drain      = 1,
        .udelay                 = 2,            /* ~100 kHz */
        .timeout                = HZ,
};

static struct platform_device gpr_i2c_device = {
        .name                   = "i2c-gpio",
        .id                     = -1,
        .dev.platform_data      = &gpr_i2c_data,
};

static struct i2c_board_info gpr_i2c_info[] __initdata = {
        {
                I2C_BOARD_INFO("lm83", 0x18),
        }
};



static struct resource alchemy_pci_host_res[] = {
        [0] = {
                .start  = AU1500_PCI_PHYS_ADDR,
                .end    = AU1500_PCI_PHYS_ADDR + 0xfff,
                .flags  = IORESOURCE_MEM,
        },
};

static int gpr_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
{
        if ((slot == 0) && (pin == 1))
                return AU1550_PCI_INTA;
        else if ((slot == 0) && (pin == 2))
                return AU1550_PCI_INTB;

        return 0xff;
}

static struct alchemy_pci_platdata gpr_pci_pd = {
        .board_map_irq  = gpr_map_pci_irq,
        .pci_cfg_set    = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
                          PCI_CONFIG_CH |
#if defined(__MIPSEB__)
                          PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
#else
                          0,
#endif
};

static struct platform_device gpr_pci_host_dev = {
        .dev.platform_data = &gpr_pci_pd,
        .name           = "alchemy-pci",
        .id             = 0,
        .num_resources  = ARRAY_SIZE(alchemy_pci_host_res),
        .resource       = alchemy_pci_host_res,
};

static struct platform_device *gpr_devices[] __initdata = {
        &gpr_wdt_device,
        &gpr_mtd_device,
        &gpr_i2c_device,
        &gpr_led_devices,
};

static int __init gpr_pci_init(void)
{
        return platform_device_register(&gpr_pci_host_dev);
}
/* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
arch_initcall(gpr_pci_init);


static int __init gpr_dev_init(void)
{
        gpiod_add_lookup_table(&gpr_i2c_gpiod_table);
        i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));

        return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
}
device_initcall(gpr_dev_init);